NSSCSOLUTIONNIPPON STEEL Stainless Steel Corporation

DUPLEXSTAINLESS STEEL

EXPERIENCEKNOWLEDGEINNOVATION

stainless.nipponsteel.com

01

NSSC DUPLEX
Stainless Steel
INDEX
P̲03-04

Features of NSSC original duplex stainless steel

P̲05

Duplex stainless steel lineup

P̲06

Physical properties/Mechanical properties

P̲07-08

NSSC original duplex stainless steelP̲09-12Characteristics of duplex stainless steelP̲13-16

Examples of Applications

P̲17

Precautions for Use

P̲18

Applicable StandardsP̲19-20

Speciﬁcationss t a i n l e s s.n ippon ste e l.c om

02

NSSC ™ Duplex
seriesReal Innovation
New value is added to society by a fusion between cutting edge
materials developed entirely from the user perspective
and the creativity required to make best use of them.

Tsukishimagawa Terrace Bridge (SUS821L1)

03
Features of NSSC original duplex stainless steel

NSSC original duplex stainless steel

achieves a large improvement in weldability! ※High strength forthinner designs
Superior wear resistance
Lower costs(Reduced weight → Reduced material,

production, and transportation costs)

Highstrength
Stable prices

Reduced rare metal content

Lower environmental impact

Resource
savings

DUPLE XHigh
corrosion
resistance

Lower costs

Wide range ofsteel grade variations
Superior stress corrosion
cracking (SCC) resistance
Lower costs(Reduced rare metals)Good
polishingproperty(Reduced maintenance loads andLowerthermalexpansion

longer lifetimes)

Relaxation of thermal strain

Excellent polishingproperty

Improved thermal fatigue
characteristics

Lower costs

Lower costs(Reduced production loads)(Reduced maintenance loads andlonger lifetimes)

Weldability
NS S C 2 1 2 0 ™
NS S C 2 3 5 1 ™

Lower costs(Reduced production loads)※ Compared to conventional duplex stainless steels t a i n l e ss.n ippon ste e l.c om

04
Metal structure of duplex stainless steel

Austenitic-ferritic duplex structure
Austenitic structure(Example: TP304)

Ferritic structure(Example: TP430)+
BCC
Same as body-centeredcubic steel (Fe)

BCC

FCC

Approx. 1:1
Magnetic

Strongly magnetic

FCC
Same as face-centered cubic
Au, Ag, or Al
Non-magnetic

Duplex steel is diﬀerent from double-layer steel(clad steel plate).

NSSC original stainless duplex stainless steel
features greatly improved welding workability.※
Relationship between thermal history andnitride precipitation zone during welding(concept image)

Thermal history

Temperature

NSSC original chemical composition design
inhibits nitride precipitation,

which is a cause of reduced weldability.
Precipitation zone in conventional
duplex stainless steel
Precipitation zone in NSSC
original duplex stainless steel

Nitride precipitation
Reduced performance

Time

05
Duplex stainless steel lineup

A wide lineup is available ranging from resource-saving Lean grade to the Super grade
which can withstand seawater.

Users can choose the steel grade that is most suitable for the service environment.

S32304

S31803
S32205NSSC 2351™

S31260

S32750High strength

NSSC 2120™
(S82122)

TP304

S31254

TP317L

TP316L

Brackish water
environment

Fresh water
environment

Seawaterenvironment

Good pitting corrosion resistanceClassification

Lean Duplex

Standard
DuplexSuper Duplex

Austenitic

NSSC standard/ ASTM standard
JIS standard
(UNS)
*3)

*1)

*2)

Main chemicalcomposition (wt%)

PREN

CI

Products thatcan be provided

NSSC 2120™
(SUS821L1)

S82122

21Cr-2Ni-3Mn-Cu-0.17N

25

26

Coil&Sheets,
Plates,rods

SUS323L

S3230423Cr-4Ni-0.15N

27

27

Coil&Sheets,
Plates, rods

NSSC 2351™
(SUS329J1)ー

23Cr-5Ni-1Mo-0.17N

30

32

Coil&Sheets,
Plates,rods

SUS329J3L

S31803
S3220522Cr-5Ni-3Mo-0.15N

34

38

Coil&Sheets,
Plates, rods

SUS329J4L

S3126025Cr-6Ni-3Mo-0.15N

36

41

Coil&Sheets,
Plates, rods

SUS327L1

S3275025Cr-7Ni-4Mo-0.28N

42

49

Coil&Sheets,
Plates, rods

SUS304

S3040018Cr-8Ni-Low N

19

19

Coil&Sheets,
Plates, rods

SUS316L

S3160318Cr-12Ni-2.5Mo-Low C-N

26

28

Coil&Sheets,
Plates, rods

SUS317L

S3170318Cr-12Ni-3.5Mo-Low C-N

30

32

Coil&Sheets,
Plates, rods

SUS312L

S3125420Cr-18Ni-6Mo-0.2N

43

50

Coil&Sheets,
Plates*1) PREN= Cr%+3.3 x Mo% +16 N%(pitting resistance equivalent number)*2) CI=Cr%+4.1Mo%+27N%(crevice corrosion index)*3) Flat productss t a i n l e s s.n ippon ste e l.c om

06
Physical properties (reference values)

Classification

Lean Duplex

Standard
DuplexSuper Duplex

Austenitic*1)

Modulus of

NSSC standard/ Density longitudinal elasticity Specific heat
JIS standard(g/cm³)(kN/mm²) (kJ/kg/℃)

Specific electric
ThermalCoefficient ofresistivity
conductivity linear expansion(10-⁸Ωm)(W/m/℃)( 10-⁶/℃)

NSSC 2120™
(SUS821L1)

7.80

200

0.5

80

16.0

13.7

SUS323L

7.80

200

0.5

80

16.0

13.0

NSSC 2351™
(SUS329J1)

7.80

200

0.5

80

15.2

13.1

SUS329J3L

7.80

200

0.5

80

12.5

13.7

SUS329J4L

7.80

200

0.5

80

13.4

13.4

SUS327L1

7.80

200

0.5

80

14.0

13.0

SUS304

7.93

193

0.5

72

16.3

17.3

SUS316L

7.98

193

0.5

74

16.3

16.0

*1) Density values reference the JIS standard.

Sources: Duplex Stainless Steel Machining Manual (IMOA)Best Uses of Duplex Stainless Steel (The Society of Materials Science, Japan)
Information for NSSC 2120™ and NSSC 2351™ are sample measurements byour company.

Mechanical properties (reference values)

Classification

Lean Duplex

Standard
DuplexSuper Duplex

Austenitic

NSSC standard/
JIS standard

FinishNSSC 2120™
(SUS821L1)

2B
2B

SUS323L

2B

NSSC 2351™
(SUS329J1)

Thickness(mm)

0.2% yield strength Tensile strength Elongation Hardness

（MPa)

（MPa)

1.5

570

792

31

256

3.0

544

759

35

244

1.5

580

790

30

253

2B

1.5

613

830

29

264

2B

3.0

608

809

31

255

SUS329J3L

2B

1.5

641

867

28

277

SUS329J4L

2B

1.5

686

868

25

293

SUS327L1

2B

1.5

725

955

26

313

SUS304

2B

1.5

300

654

56

170

SUS316L

2B

1.5

281

561

53

143

（％）

HV

07
NSSC Duplex Series

Utilizing the high strength and high corrosion resistance makes possible
VE by changing from regular stainless steel and other materials.
Positioning of NSSC 2120™ and NSSC 2351™
S31803
S32205
S31260Strength → Higher

Improved weldability
NSSC 2120™

Higher strength
Higher corrosion
resistance

Carbon steel

NSSC 2351™

Lower costs resulting
from optimal designs(S82122)

Higher strength
Improved SCC

TP304

Titanium

Higher strength
Higher corrosion
resistance

TP316L

Corrosion resistance → Higher

NSSC 2120 ™
1Corrosion resistance is equal to or better
than TP304.

NSSC 2351™
1

Corrosion resistance is equal to or better
than TP316L.

2

SCC resistance is largely superior to TP304.

2

SCC resistance is largely superior to TP316L.

3

Utilizing the higher strength makes thinnerand lighter-weight designs possible.

3

When used as a replacement for TP316L, thinnerand lighter-weight designs are possible andlife cycle costs can be reduced.

4

When switching from carbon steel, there is alimited initial increase in cost, however theoverall life cycle costs are reduced.

4

Changing from high-grade materials(avoiding
excessively high specifications) can achieve alarge reduction in cost.

NSSC 2120™

Possible applications

Dam● River facilities

Flood gate

Weir

BridgeFresh water environment：NSSC 2120™

Brackish water environment：NSSC 2351™

● Buildings and civil engineering

Drainage pumpstationWater supply
and sewerage

Factory

Inland environment：NSSC 2120™

Coastal environment：NSSC 2351™

● Tanks and other factory equipment

Building
materials

Equipment using TP304：NSSC 2120™

River mouth
weir

Equipment using TP316L：NSSC 2351™

NSSC 2351™

※For a full seawater environment, S31260
or Super Duplex S32750 is recommended.

s t a i n l e s s.n ippon ste e l.c om

08
NSSC 2120™ and NSSC 2351™ weldability
High heat-input welding is possible.

Welding efficiency is greatly increased by

The recommended heat input range forthe use of high heat-input welding.

NSSC 2120™ and NSSC 2351™ is larger thanconventional duplex stainless steel, allowing

Because SAW high heat-input welding can be used, eﬃcient

It is particularly suitable for construction of large-size structures.

Recommended heat input during welding

Suitable range

FCAW

Welding
methodSAW

S32101

Ordinary
welding

S32304

FCAW

Flux Cored
Arc Welding

S31803/S32205
NSSC 2120™ / NSSC 2351™

Applicability
Macroscopic Number Welding
Groove shape andofheat input NSSC 2120™
laminating procedure cross-section
passeskJ/cm
image
NSSC 2351™
8
1High heatinput welding

TP304/TP316L

5

NS S C 2 1 2 0 ™
NS S C 2 3 5 1 ™

welding is possible (2 or more compared to ordinary welding).

high heat-input welding.

0

Weldability

4

SAW

10
15
20
25
Heat input (kJ/cm)

Submerged
Arc Welding

30

8

10

4

35

NSSC 2120™ and NSSC 2351™ weld corrosion resistance
NSSC 2120™ weld corrosion resistance is equal to or greater than that of
TP304 welds.

Corrosion resistance in a neutral high-salinity environment

BetterCorrosion resistanceCritical pitting temperature ( C)(Critical pitting temperature)30

Conforms to JIS G0590
5.5%NaCl-745mV vs SSE

25
20

Exposure test results

Weldability
NS S C 2 1 2 0 ™
NS S C 2 3 5 1 ™

Exposed for 1 year approximately 30 m from theocean on the coast of Yamaguchi Prefecture.
TIG welding was performed at the center, followed by pickling.

NSSC 2120™

Front

Back

TP304

Front

Back

15
10
5
0

Base metal Weld

NSSC 2120™

Base metal Weld

TP304

NSSC 2351™ weld corrosion resistance is equal to or greater than that of
TP316L welds.

Corrosion resistance

Pitting potential (mV vs SSE)

BetterSample pitting potentials of base metal and welds
600

JIS G0577 1M NaCl 50℃
V-groove, filler used (DP8)Ferric chloride test results

JIS G 0578-B 72 h 15 C TIG welding, 3 mmt, V-groove, 2 passes, Ar shield
Filler used (YM-DP8/2351, YM-316L/316L)

NSSC 2351™

TP316L400⬅ Weld2000No pitting
Base metal FCAWTIG

NSSC 2351™

Base metal

TP316L

Pitting occurs

09Characteristics of duplex stainless steel

Utilizing the material high strength makes thinner andHighstrength

lighter-weight designs possible. ※Concept image

TP304
TP316LNSSC 2120™
NSSC 2351™

TP304
full thread25%
reduction insteel weightThickness

Weight can be
reduced.
M16

Thickness

3〜8mm

NSSC 2120™
full thread

M12

2〜6mm

Typical examples of mechanical properties

JIS Z 2201(No.14) 0.2% yield strength Tensile strength

Product type

【 Design strength 】※When designed for yield strength
400N/mm²
400N/mm²

235N/mm²

TP304

TP304 full thread

486

643

Relationship of thickness and deformation load (example):NSSC 2120™

100

315N/mm²

SS400

TP316L

120

355N/mm²

SM490

801

Compared with TP304, thickness can be reduced by 25%.

Deformation load P (kgf)

SMA490N/mm²

600Potential for reduced thickness at
bending tests (trial calculations)Comparison of design standard
strengths

NSSC 2351™
NSSC 2120™

N/mm²

NSSC 2120™ full thread

205N/mm²
175N/mm²

High strength:TP304

80
60
40
20
0
0.0

0.5

【 Stress-strain curve 】〔N/mm2〕800

Calculation basis conditions

Modulus of longitudinal elasticity 200 kN/mm²(3-point bending)

NSSC 2351™

700
Stress600

P(kgf)

t(mm)

500

TP304

400
300
100
0

0.01

Strain0.02

0.03

s t a i n l e s s.n ippon ste e l.c om

2.0

P＝

2.5

2bσy
t²
3L

Deformation load : P (kgf)Distance between

L(mm)

SS400

200
0

1.0
1.5
Thickness t (mm)support points : L (mm)Thickness : t (mm)Width : b (mm)

10
High
corrosion
resistanceWide range of steel grade variations
Pitting resistance in a chloride environment
S32750Base metal data70

：Duplex：Austenitic

60
50
40

Pittingoccurs

30
20

B

0
10

S31254
S31260S31803

S3230420

No pitting

TP317L

TP316L

TP304
15

et

r
te

NSSC 2351™

NSSC 2120™

10

Crevice corrosion in a chloride environment

Critical crevice corrosion temperature
CCT(℃)

Critical pitting temperature
CPT(℃)

80

25

30

35

40

45

50

60
50
40
30

Base metal data

B

TP316L

0
20

PREN=[Cr]+3.3[Mo]+16[N](pitting resistance equivalent number)

Exposure test

NSSC 2120™

TP316LNSSC 2351™

25

S31803TP317LS3230430

35

S32750

S3126040

No crevice corrosion
45

50

55

60

CI=[Cr]+4.1[Mo]+27[N](crevice corrosion index)

Sulfuric acid resistance limit of application（≦0.1mm/y）
100

Temperature T ( C)TP304

Results from exposure for 1 year in SE Asia oceane

NSSC 2351™

20
10

S31254Crevice corrosioneroccurs
tt

90
80
70

NSSC 2120™

60
50

TP316L

40

TP304

30
20

NSSC 2351™

0

10

20
30
Concentration (%)

40

Pretreatment
After #600 chemical polishing, exposed for 24 hours
in 40 ‒ 45% RH desiccator.
Test condition: 24 hour immersion

Excellent stress corrosion cracking resistance (SCC resistance)

Compared to austenitic stainless steel in the same class, duplex stainless steel has superior stresscorrosion cracking resistance (SCC resistance) in a chloride environment.
105
100※Schematic

Pulling

Boiling 42%MgCl₂
Time to fracture (hr)Pulling

103.1
Boiling 42%MgCl₂
Load stress 80N/mm²

SCC resistance improvement
mechanism
It was confirmed that the crack end
branches at the αγ interface.

40

α

35

γ

30
25

γ

20
15
10

1.1

5
0

High
corrosion
resistance

NSSC 2120™

TP304

6.2
α＝Ferrite phase

TP316L

γ＝Austenite phase11
Characteristics of duplex stainless steelLowthermalexpansion

Relaxing of thermal strain

Average coefficient oflinear expansion（10 - ⁶/℃）

Compared to austenitic stainless steel, the coefficient of linear expansion is lower.
This can be expected to produce longer lifetimes in equipment where thermal strain is a problem.
20
TP316

18
16

Beforeheating

NSSC 2120™

L

14
NSSC 2351™

12
10

Metal rod

0

100

200

300

400

500

△L

After
heating
600

700

800

900

Coefficient of linear expansion = ΔL/L (per 1 C)

Temperature（℃）

Excellent polishing property
NSSC 2120™ provides superior polishing property, with the finish (yellow box) after 1 pass equivalentGood
polishingproperty

to the finish after 3 passes with TP304, making it possible to reduce the man-hours required for polishing.
Polishing conditions

Material before polishing : Cold-rolled 3.0 mm, No. 2B finish
Polishing powder : #400 alumina based powder

Polishing conditions : Buff diameter 400 mm, speed 2000 rpm, material movement speed 286 mm/s

NSSC 2120™

TP304

After 1 pass

After 3 passes

Surfaceirregularities
It is thought that buffing performance is affected by the differences in the grain boundary
depth that can be seen in the material surface after pickling.

s t a i n l e s s.n ippon ste e l.c om

12Price stability

Uses much smaller amounts of Ni and Mo ‒ expensive materials that are subject to price fluctuations.
Comparison of main components

40

TP304

NSSC 2120™

TP316LNSSC 2351™

Ni

8%

2%

Ni

12%

5%

Mo

0%

0%

Mo

2.5%

1%

Cr

18%

21%

Cr

18%

23%

Graph of fluctuation in rare metal prices
MoＯ₃
LME Ni cash monthly Avg.
FeCr by ship

35
30(＄/lb)

25
20
15
10
5
0
Jan. Jan. Jan. Jan. Jan. Jan. Jan. Jan. Jan. Jan. Jan. Jan. Jan. Jan. Jan. Jan. Jan. Jan. Jan.
2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020

NSSC ™ Duplex
seriesResource
conservation

13
Examples of Applications

01.

Pedestrian overpass (SUS821L1)

02.

NS Smart Inspection Walkway (SUS821L1)
NETIS registration No. HK-200018-A

03.

Underwater beam (SUS821L1)
Duplex stainless steel, full-thread bolts(NSSC 2120™)
NETIC registration No. CG-200011-A

04.

Dam selective water intake equipment(SUS821L1)

05.

High
strengthHighcorrosion
resistance01

NSSC ™ Duplex
seriesHighstrengthHighstrength

Drain sluice (SUS323L)

High
corrosion
resistance

02

High
strength04

Highstrengths t a i n l e s s.n ippon ste e l.c om

Highcorrosion
resistance

03

05

14

06.

Dust remover (SUS821L1)

07.

Seawater-resistant screen (SUS327L1)

08.

Spray dryer (SUS821L1)

09.

PCI coal storage tank (SUS821L1)

10.

Tide embankment ﬂoodwall gate
(SUS821L1)

High
strengthHighcorrosion
resistanceHighstrengthHighcorrosion
resistance

07

High
strengthHighcorrosion
resistance

10

High
strengthHighcorrosion
resistance

11

06

High
strengthHighcorrosion
resistanceHighstrengthHighcorrosion
resistance

08

11.

Mega-scale solar panel frame (SUS821L1)

12.

Storm surge gate (SUS323L)High
strengthHighcorrosion
resistance

09

12

15
Examples of Applications
13.

Seawater desalinization equipment(SUS329J3L or other)

14.

Chemical tanker (SUS329J3L or other)

15.

Vacuum chamber (SUS821L1)

16.

Steelmaking service reservoir(SUS329J4L or other)

17.

Cylindrical tank (SUS821L1)

18.

Food product tank (SUS329J1)

19.

Sanitary tank
(SUS821L1, SUS329J1, or other)Highstrength13

Highcorrosion
resistanceHighstrengthHighcorrosion
resistance

14
18

High
strengthLowthermalexpansion

15

16

High
strengthHighcorrosion
resistanceLow
thermalexpansion

19
High
corrosion
resistance

16

High
strengthHighcorrosion
resistance18
17

s t a i n l e s s.n ippon ste e l.c om

HighstrengthHighcorrosion
resistanceLow
thermalexpansion

16
20.

Sterile tray (SUS821L1)

21.

Home door frame (SUS821L1)

22.

Disaster supply storage facility (SUS821L1 or other)(Including bolts, nuts, and washers)Duplex stainless steel, full-thread bolts(NSSC 2120™)
NETIS registration No. CG-200011-A

23.

Truck cargo bed (SUS821L1, SUS329J1)

24.

Balcony railings for high-riseapartment building Skyplex (SUS821L1)

25.

Factory ﬂoor material (SUS821L1)

26.

Light suspension bolt (NSSC 2120™)

27.

Swimming pool (SUS821L1)

High
strength

NSSC ™ Duplex
seriesHighcorrosion
resistance

20

High
strengthLowthermalexpansion

21

HighstrengthHighcorrosion
resistance

22

High
strengthHighstrengthHighstrengthHighcorrosion
resistance

23

High
strength

24

25

26

High
strengthHighcorrosion
resistance27

17
Precautions for Use(1)Forming• Because these are high-strength stainless steels, formability is not the same as austenitic stainless steel .

• Although drawing is possible to the same shape as austenitic stainless steel , because the deformation load is approximately
10% higher, check the equipment capacity. It may be necessary to adjust dies, lubricating conditions, or other factors.

• Adjustment is necessary when bending due to the large spring-back.

• Cutting performance and drilling performance are equal to or better than austenitic stainless steel .

(2)Welding• NSSC original duplex stainless steel features greatly improved weldability and allows welding under approximately the same
conditions as austenitic stainless steel.

• However special welding material is recommended. Although welding without welding material is possible, it is necessary to checkthe weld characteristics in advance.

(3)Recommended service temperature• The recommended service temperature range is -50 to 300 C, narrower than that of austenitic stainless steel (-196 to 850 C).

Precautions when welding duplex stainless steel
1. In order to suppress the precipitation of carbonitrides and structural changes, avoid excessive or insufficient welding heat input.
2. Limit the interpass temperature to 100 to 150 C.
3. Because low-temperature cracking caused by hydrogen is possible, avoid the use of H2 in the shield gas.
4. Be sure to fully remove the welding scale.

Welding materials for carbon steel and different stainless steels
Lean Duplex

Lean Duplex

Standard
DuplexSuper Duplex

Austenitic
stainless steel

Carbon steel
Low-alloy
steel

Super Duplex

Standard Duplex

NSSC 2120™
S82122
S32304NSSC 2351™
S31803
S32205

S31260

S32750NSSC 2120™
S82122
S32304

Similar metal(lean duplex steel)Type2209

Type2209

Type2209

Type2209

NSSC 2351™
S31803
S32205

Type2209

Type2209

Type2594

Similar metal(super duplex steel)

S31260Type2209

Type2594

Type2594

Similar metal (super duplex steel)

S32750Type2209

Similar metal(super duplex steel)

Similar metal(super duplex steel)

Similar metal(super duplex steel)

TP304

Type2209
309L/309
309LMo/309Mo

Type2209
309LMo/309Mo

Type2209
309LMo/309Mo

Type2209
309LMo/309Mo

TP316LType2209
309LMoType2209
309LMoType2209
309LMoType2209
309LMo

SS400
SM490
Others

Type2209
309L/309
309LMo/309Mo

Type2209
309L/309
309LMo/309Mo

Type2209
309L/309
309LMo/309Mo

Type2209
309L/309
309LMo/309Mo

Example of suitable TIG welding conditions
NSSC 2120™(thickness 2.0 mm)

250
200
150
Suitable heat input
Insufficient heat input
Excessive heat input

100
50
0

0

20

40

60

80

Welding speed (cm/min)

NSSC 2351™(thickness 2.0 mm)

300

100

Welding current (A)Welding current (A)

300

250
200
150
Suitable heat input
Insufficient heat input
Excessive heat input

100
50
0

0

20

40

60

80

Welding speed (cm/min)s t a i n l e s s.n ippon ste e l.c om

100

18
Applicable Standards and Other Ofﬁcial Standards
NETIS registration No. QS-120023-VE

NSSC 2120™ registration in NETISNSSC 2120™ and S32304 (SUS323L) are the first stainless steel materials to be registered in the New Technology
Information System (NETIS) operated by the Ministry of Land, Infrastructure, Transport and Tourism.
QS-120023-VE Lean duplex stainless steel (NSSC 2120™, S32304 (SUS323L))

M-650 ED.4

NORSOK certification
The following duplex stainless steels have been certified as steel suitable
for marine structures.
S31803 (MDS D45)
S32205 (MDS D45)
S32750 (MDS D55)
Public standards that can be provided
NSSC 2120™
JIS G 4304:
Hot-rolled stainless steel plate, sheet and strip
JIS G 4305:
Cold-rolled stainless steel plate, sheet and strip

SUS323L

SUS821L1

NSSC 2351™

SUS329J3L

SUS329J4L

SUS327L1

SUS329J1(≥2mm thickness)

JIS G 4303:
Stainless steel bars

JIS G 4308:
Stainless steel wire rods
JIS B 8265:
Construction of pressure vessel ‒ Generalprinciples (safety factor 4)
JIS B 8267:
Construction of pressure vessel (safety factor 3.5)
NK ship class
ASTM
A240/240M:
Standard Specification for Chromium
and Chromium-Nickel Stainless Steel Plate,
Sheet, and Strip for Pressure Vessels andfor General Applications

SUS821L1 （JIS G 4303） SUS329J1（JIS G 4303）（JIS G 4303）(JIS B 8267) (JIS B 8267)

SUS329J1(≥2mm thickness)

KSUS821L1

KSUS329J1 KSUS329J3L

S82122

S32304(JIS B 8267)

S31803
S32205

S31260

S32750AwardsNSSC 2120™

6th Monodzukuri Nippon Grand Awards
Received the Minister of Economy,
Trade and Industry Award.

Monodzukuri
Nippon Grand Awards
Minister of Economy,
Trade and Industry Award

19
Speciﬁcations

Hot-rolled plate (4Hi)Classification
Lean Duplex

Standard Duplex
Super Duplex

Austenitic

Grade0.2% yield strength Tensile strength Elongation
(MPa)
(MPa)
(%)

Hardness
HB
HRC

NSSC 2120™

400

600

30

290

32

S82122

400

600

30

290

32

S32304

400

600

25

290

32

NSSC 2351™

400

600

25

277

29

S31803

450

620

25

293

31

S32205

450

655

25

293

31

S32750

550

795

15

310

32

TYPE304

205

515

40

201

­

TYPE316L

170

485

40

217

­

TYPE317L

205

515

40

217

­

S31254

310

655

35

223

­

(1MPa=1N/mm²)

Cold-rolled sheet and strip
Classification

Grade

Standard Duplex

Super Duplex

Austenitic

0.2% yield strength Tensile strength Elongation
(MPa)
(MPa)
(%)

HRC

HV

500

700

25

290

32

320

3.0

400

600

30

290

32

S82122

<3.0

500

700

25

290

32

-

3.0

400

600

30

290

32

-

S32304

-

400

600

25

290

32

-

NSSC 2351™

<2.0

400

600

20

302

32

2.0

400

600

20

277

29

450

620

25

293

31

-

S31803

HB

Hardness<3.0

NSSC 2120™
Lean Duplex

Thickness
(mm)

320

320
292

S32205

-

450

655

25

293

31

-

S32750

-

550

795

15

310

32

-

TYPE304

-

205

515

40

201

-

-

TYPE316L

-

170

485

40

217

-

-

TYPE317L

-

175

480

40

187

-

-

S31254

<5.0

310

690

35

223

-

-

(1MPa=1N/mm²)

Hot-rolled sheet and strip
Classification

Lean Duplex

Standard Duplex
Super Duplex

Austenitic

Grade

Thickness(mm)

0.2% yield strength Tensile strength Elongation
(MPa)
(%)
(MPa)

HB

Hardness
HRC

HV

NSSC 2120™

>2.0

400

600

25

290

32

S82122

3.0

400

600

30

290

32

-

S32304

-

400

600

25

290

32

NSSC 2351™

<6.0

400

600

20

277

29

6.0

400

600

25

277

29

320

292
292

S31803

-

450

620

25

293

31

-

S32205

-

450

655

25

293

31

-

S32750

-

550

795

15

310

32

-

TYPE304

-

205

515

40

201

-

-

TYPE316L

-

170

485

40

217

-

-

TYPE317L

-

175

480

40

187

-

-

S31254

<5.0

310

690

35

223

-

-

(1MPa=1N/mm²)s t a i n l e s s.n ippon ste e l.c om

20
Wires and rods
Classification

Lean Duplex

Standard Duplex

Grade/UNS

Diameter(mm)

NSSC 2120™

φ75

400

600

25

SUS821L1

φ75

400

600

25

Hardness

0.2% yield strength Tensile strength Elongation Reductionof area(%)(N/mm²)(N/mm²)
(%)

HB

HRC

HV

40

290

32

310

40

290

32

310
310

SUS323L

-

400

600

25

40

290

32

SUS329J1

-

390

590

18

40

277

29

292

SUS329J3L

-

450

620

18

40

302

32

320

TYPE31803

-

450

620

18

40

302

32

320

TYPE32205

-

450

620

18

40

302

32

320

SUS329J4L

-

450

620

18

40

302

32

320

φ50.8

550

800

15

40

310

32

330

＞φ50.8

515

760

15

40

310

32

330

Super Duplex

SUS327L1

Steel for welding

ER2209

-

TP304

-

205

520

40

60

187

-

200

TP316L

-

175

480

40

60

187

-

200

TP317L

-

175

480

40

60

187

-

200

Austenitic

-

-

-

-

-

-

-

(1MPa=1N/mm²)

NSSC ™ Duplex
seriesNSSC SOLUTIONNSSC Yawata Works Thick Plate PlantNSSC
SOLUTION
21

経験

technology
技術力

experience

NSSC
SOLUTION

知識

日鉄ステンレス株式会社

knowledge

JAPAN QUALITYNIPPON STEEL
Stainless Steel Corporation

改革

innovation

開発力

development
quality
品質

Head Oﬃce
Tekko Bldg., 1-8-2 Marunouchi, Chiyoda-Ku,
Tokyo 100-0005, Japan

Phone +81-3-6841-4800 (Reception)

Branches

Overseas Oﬃces

Osaka Sales Oﬃce

Bangkok Oﬃce

Sumitomo Bldg., 4-5-33 Kitahama, Chuo-ku,
Osaka-shi, Osaka 541-0041, Japan
Phone +81-6-4706-1180

Aichi 460-0003, Japan

1 MD Tower, 20th Floor, Soi Bangna-Trad 25, Bangna-Trad Road, KM.3,
Bangna Nuea, Bangna, Bangkok 10260 Thailand
Phone +66-2-744-0720

Nagoya Sales Oﬃce
Takisada Bldg.2-13-19(NS-Thainox Auto Company Limited.)

Nishiki, Naka-ku ,Nagoya-shi,

Shanghai Oﬃce

Phone +81-52-232-2250(NIPPON STEEL Stainless Steel (Shanghai) Company Limited)

Niigata Sales oﬃce

Room No.904, UNITED PLAZA, 1468 Nanjing Road West, Shanghai 200040, China

Taiju-Seimei Niigata Bldg., 1-3-10 Higashi Oodori,

Phone +86-21-62892928

Chuo-ku, Niigata-shi, Niigata 950-0087, Japan
Phone +81-25-246-3113

Guangzhou Oﬃce

Chugoku Sales Oﬃce

Hiroshima-Teppouchou Bldg., 10-12 Teppouchou,Naka-ku, Hiroshima-shi, Hiroshima 730-0017, Japan
Phone +81-82-511-5115(NIPPON STEEL Stainless Steel (Shanghai) Company Limited Guangzhou Branch)
Room No.1404, South Tower, GT Land Plaza 2, No.8 Zhujiang Xi Road,
Guangzhou 510623, China
Phone +86-20-38739850

Kyushu Sales Oﬃce

Hakata-NS Bldg., 5-18 Tenya-machi, Hakata-ku,
Fukuoka-shi, Fukuoka 812-0025, Japan
Phone +81-92-273-7090

Hokuriku Marketing Branch

Kitanippon Sakurabashi Bldg. 1-18, Sakurabashi-dori,
Toyama-shi, Toyama 930-0004, Japan
Phone +81-76-415-0527

s t a i n l e s s.n ippon ste e l.c om22Creating the future one step ahead

NSSC Duplex WEB

NSSC Duplex

SearchHead Oﬃce Products Development Division+81-3-6841-5290
Biratori Dam sand discharge facility (SUS821L1)

TECHNOLOGYDEVELOPMENTQUALITY

Achieve reductions in total costswith NSSC original duplex stainless steel!

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NSSC
DUPLEX

Reduction of material cost
Reduction of production andtransportation costs
Reduction of maintenance andmanagement costs

Head Oﬃce Products Development Division+81-3-6841-5290
s t a i n l e ss.n ippon ste e l.c om

DUPLEXE05 2024.01